Man meets the battle of life in the manner most consonant with the essential quality most dominant in his nature. There are, according to the Sankhya philosophy accepted in this respect by the Gita, three essential qualities or modes of the world energy and therefore also of human nature, sattva, the mode of poise, knowledge and satisfaction, rajas, the mode of passion, action and struggling emotion, tamas, the mode of ignorance and inertia.
Dominated by tamas, man does not so much meet the rush and shock of the world-energies whirling about him and converging upon him as he succumbs to them, is overborne by them, afflicted, subjected; or at the most, helped by the other qualities, the tamasic man seeks only somehow to survive, to subsist so long as he may, to shelter himself in the fortress of an established routine of thought and action in which he feels himself to a certain extent protected from the battle.
Dominated by rajas, man flings himself into the battle and attempts to use the struggle of forces for his own egoistic benefit, to slay, conquer, dominate, enjoy; or, helped by a certain measure of the satwik quality, the rajasic man makes the struggle itself a means of increasing inner mastery, joy, power, possession. The battle of life becomes his delight and passion partly for its own sake, for the pleasure of activity and the sense of power, partly as a means of his increase and natural self-development.
Dominated by sattva, man seeks in the midst of the strife for a principle of law, right, poise, harmony, peace, satisfaction. The purely satwik man tends to seek this within, whether for himself alone or with an impulse to communicate it, when won, to other human minds, but usually by a sort of inner detachment from or else an outer rejection of the strife and turmoil of the active world-energy; but if the satwik mind accepts partly the rajasic impulse, it seeks rather to impose this poise and harmony upon the struggle and apparent chaos, to vindicate a victory for peace, love and harmony over the principle of war, discord and struggle. All the attitudes adopted by the human mind towards the problem of life either derive from the domination of one or other of these qualities or else from an attempt at balance and harmony between them.